Add properties to the text from START to END.
The third argument PROPERTIES is a property list
specifying the property values to add.  If the optional fourth argument
OBJECT is a buffer (or nil, which means the current buffer),
START and END are buffer positions (integers or markers).
If OBJECT is a string, START and END are 0-based indices into it.
Return t if any property value actually changed, nil otherwise.

Return the value of POSITION's property PROP, in OBJECT.
Both overlay properties and text properties are checked.
OBJECT is optional and defaults to the current buffer.
If POSITION is at the end of OBJECT, the value is nil.
If OBJECT is a buffer, then overlay properties are considered as well as
text properties.
If OBJECT is a window, then that window's buffer is used, but window-specific
overlays are considered only if they are associated with OBJECT.

Like `get-char-property', but with extra overlay information.
The value is a cons cell.  Its car is the return value of `get-char-property'
with the same arguments--that is, the value of POSITION's property
PROP in OBJECT.  Its cdr is the overlay in which the property was
found, or nil, if it was found as a text property or not found at all.

OBJECT is optional and defaults to the current buffer.  OBJECT may be
a string, a buffer or a window.  For strings, the cdr of the return
value is always nil, since strings do not have overlays.  If OBJECT is
a window, then that window's buffer is used, but window-specific
overlays are considered only if they are associated with OBJECT.  If
POSITION is at the end of OBJECT, both car and cdr are nil.

Return the value of POSITION's property PROP, in OBJECT.
OBJECT is optional and defaults to the current buffer.
If POSITION is at the end of OBJECT, the value is nil.

Return the position of next text property or overlay change.
This scans characters forward in the current buffer from POSITION till
it finds a change in some text property, or the beginning or end of an
overlay, and returns the position of that.
If none is found up to (point-max), the function returns (point-max).

If the optional second argument LIMIT is non-nil, don't search
past position LIMIT; return LIMIT if nothing is found before LIMIT.
LIMIT is a no-op if it is greater than (point-max).

Return the position of next property change.
Scans characters forward from POSITION in OBJECT till it finds
a change in some text property, then returns the position of the change.
If the optional second argument OBJECT is a buffer (or nil, which means
the current buffer), POSITION is a buffer position (integer or marker).
If OBJECT is a string, POSITION is a 0-based index into it.
Return nil if the property is constant all the way to the end of OBJECT.
If the value is non-nil, it is a position greater than POSITION, never equal.

If the optional third argument LIMIT is non-nil, don't search
past position LIMIT; return LIMIT if nothing is found before LIMIT.

Return the position of next text property or overlay change for a specific property.
Scans characters forward from POSITION till it finds
a change in the PROP property, then returns the position of the change.
If the optional third argument OBJECT is a buffer (or nil, which means
the current buffer), POSITION is a buffer position (integer or marker).
If OBJECT is a string, POSITION is a 0-based index into it.

In a string, scan runs to the end of the string.
In a buffer, it runs to (point-max), and the value cannot exceed that.

The property values are compared with `eq'.
If the property is constant all the way to the end of OBJECT, return the
last valid position in OBJECT.
If the optional fourth argument LIMIT is non-nil, don't search
past position LIMIT; return LIMIT if nothing is found before LIMIT.

Return the position of next property change for a specific property.
Scans characters forward from POSITION till it finds
a change in the PROP property, then returns the position of the change.
If the optional third argument OBJECT is a buffer (or nil, which means
the current buffer), POSITION is a buffer position (integer or marker).
If OBJECT is a string, POSITION is a 0-based index into it.
The property values are compared with `eq'.
Return nil if the property is constant all the way to the end of OBJECT.
If the value is non-nil, it is a position greater than POSITION, never equal.

If the optional fourth argument LIMIT is non-nil, don't search
past position LIMIT; return LIMIT if nothing is found before LIMIT.

Return the position of previous text property or overlay change.
Scans characters backward in the current buffer from POSITION till it
finds a change in some text property, or the beginning or end of an
overlay, and returns the position of that.
If none is found since (point-min), the function returns (point-min).

If the optional second argument LIMIT is non-nil, don't search
past position LIMIT; return LIMIT if nothing is found before LIMIT.
LIMIT is a no-op if it is less than (point-min).

Return the position of previous property change.
Scans characters backwards from POSITION in OBJECT till it finds
a change in some text property, then returns the position of the change.
If the optional second argument OBJECT is a buffer (or nil, which means
the current buffer), POSITION is a buffer position (integer or marker).
If OBJECT is a string, POSITION is a 0-based index into it.
Return nil if the property is constant all the way to the start of OBJECT.
If the value is non-nil, it is a position less than POSITION, never equal.

If the optional third argument LIMIT is non-nil, don't search
back past position LIMIT; return LIMIT if nothing is found until LIMIT.

Return the position of previous text property or overlay change for a specific property.
Scans characters backward from POSITION till it finds
a change in the PROP property, then returns the position of the change.
If the optional third argument OBJECT is a buffer (or nil, which means
the current buffer), POSITION is a buffer position (integer or marker).
If OBJECT is a string, POSITION is a 0-based index into it.

In a string, scan runs to the start of the string.
In a buffer, it runs to (point-min), and the value cannot be less than that.

The property values are compared with `eq'.
If the property is constant all the way to the start of OBJECT, return the
first valid position in OBJECT.
If the optional fourth argument LIMIT is non-nil, don't search back past
position LIMIT; return LIMIT if nothing is found before reaching LIMIT.

Return the position of previous property change for a specific property.
Scans characters backward from POSITION till it finds
a change in the PROP property, then returns the position of the change.
If the optional third argument OBJECT is a buffer (or nil, which means
the current buffer), POSITION is a buffer position (integer or marker).
If OBJECT is a string, POSITION is a 0-based index into it.
The property values are compared with `eq'.
Return nil if the property is constant all the way to the start of OBJECT.
If the value is non-nil, it is a position less than POSITION, never equal.

If the optional fourth argument LIMIT is non-nil, don't search
back past position LIMIT; return LIMIT if nothing is found until LIMIT.

Set one property of the text from START to END.
The third and fourth arguments PROPERTY and VALUE
specify the property to add.
If the optional fifth argument OBJECT is a buffer (or nil, which means
the current buffer), START and END are buffer positions (integers or
markers).  If OBJECT is a string, START and END are 0-based indices into it.

Remove some properties from text from START to END.
The third argument LIST-OF-PROPERTIES is a list of property names to remove.
If the optional fourth argument OBJECT is a buffer (or nil, which means
the current buffer), START and END are buffer positions (integers or
markers).  If OBJECT is a string, START and END are 0-based indices into it.
Return t if any property was actually removed, nil otherwise.

Remove some properties from text from START to END.
The third argument PROPERTIES is a property list
whose property names specify the properties to remove.
(The values stored in PROPERTIES are ignored.)
If the optional fourth argument OBJECT is a buffer (or nil, which means
the current buffer), START and END are buffer positions (integers or
markers).  If OBJECT is a string, START and END are 0-based indices into it.
Return t if any property was actually removed, nil otherwise.

Use `set-text-properties' if you want to remove all text properties.

Completely replace properties of text from START to END.
The third argument PROPERTIES is the new property list.
If the optional fourth argument OBJECT is a buffer (or nil, which means
the current buffer), START and END are buffer positions (integers or
markers).  If OBJECT is a string, START and END are 0-based indices into it.
If PROPERTIES is nil, the effect is to remove all properties from
the designated part of OBJECT.

Return the list of properties of the character at POSITION in OBJECT.
If the optional second argument OBJECT is a buffer (or nil, which means
the current buffer), POSITION is a buffer position (integer or marker).
If OBJECT is a string, POSITION is a 0-based index into it.
If POSITION is at the end of OBJECT, the value is nil.

Check text from START to END for property PROPERTY equaling VALUE.
If so, return the position of the first character whose property PROPERTY
is `eq' to VALUE.  Otherwise return nil.
If the optional fifth argument OBJECT is a buffer (or nil, which means
the current buffer), START and END are buffer positions (integers or
markers).  If OBJECT is a string, START and END are 0-based indices into it.

Check text from START to END for property PROPERTY not equaling VALUE.
If so, return the position of the first character whose property PROPERTY
is not `eq' to VALUE.  Otherwise, return nil.
If the optional fifth argument OBJECT is a buffer (or nil, which means
the current buffer), START and END are buffer positions (integers or
markers).  If OBJECT is a string, START and END are 0-based indices into it.