Marks

A mark is a Lisp object which points to a character in a file (or buffer), as the buffer the file is stored in is modified the position the mark points to is also modified so that the mark will always point to the same character.

The character that a mark points to does not have to be loaded into the editor all the time either; if the file the character is in is not resident in a buffer the mark will simply contain the character's position and the file's name. When a file is loaded any marks pointing to the file are altered so that they point straight to the buffer containing the file.

Function: markp object

This function returns t if its argument is a mark.

• Mark Components: Marks contain two values; position and file
• Mark Relocation: How the position of a mark is updated as its buffer is modified
• Mark Residency: Marks may point to files which have not been loaded
• Creating Marks: Functions to allocate new mark objects
• Altering Marks: Setting the components of a mark
• Moving to Marks: Moving the cursor to the character a mark points to

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