— User Option: indicate-empty-lines

When this is non-nil, Emacs displays a special glyph in the fringe of each empty line at the end of the buffer, on graphical displays. See Fringes. This variable is automatically buffer-local in every buffer.

— User Option: indicate-buffer-boundaries

This buffer-local variable controls how the buffer boundaries and window scrolling are indicated in the window fringes.

Emacs can indicate the buffer boundaries—that is, the first and last line in the buffer—with angle icons when they appear on the screen. In addition, Emacs can display an up-arrow in the fringe to show that there is text above the screen, and a down-arrow to show there is text below the screen.

There are three kinds of basic values:

nil

Don't display any of these fringe icons.

left

Display the angle icons and arrows in the left fringe.

right

Display the angle icons and arrows in the right fringe.

any non-alist

Display the angle icons in the left fringe and don't display the arrows.

Otherwise the value should be an alist that specifies which fringe indicators to display and where. Each element of the alist should have the form (indicator . position). Here, indicator is one of top, bottom, up, down, and t (which covers all the icons not yet specified), while position is one of left, right and nil.

For example, ((top . left) (t . right)) places the top angle bitmap in left fringe, and the bottom angle bitmap as well as both arrow bitmaps in right fringe. To show the angle bitmaps in the left fringe, and no arrow bitmaps, use ((top . left) (bottom . left)).

— Variable: fringe-indicator-alist

This buffer-local variable specifies the mapping from logical fringe indicators to the actual bitmaps displayed in the window fringes.

These symbols identify the logical fringe indicators:

Truncation and continuation line indicators:

truncation, continuation.

Buffer position indicators:

up, down, top, bottom, top-bottom.

Empty line indicator:

empty-line.

Overlay arrow indicator:

overlay-arrow.

Unknown bitmap indicator:

unknown.

The value is an alist where each element (indicator . bitmaps) specifies the fringe bitmaps used to display a specific logical fringe indicator.

Here, indicator specifies the logical indicator type, and bitmaps is list of symbols (left right [left1 right1]) which specifies the actual bitmap shown in the left or right fringe for the logical indicator.

The left and right symbols specify the bitmaps shown in the left and/or right fringe for the specific indicator. The left1 or right1 bitmaps are used only for the `bottom' and `top-bottom indicators when the last (only) line in has no final newline. Alternatively, bitmaps may be a single symbol which is used in both left and right fringes.

When fringe-indicator-alist has a buffer-local value, and there is no bitmap defined for a logical indicator, or the bitmap is t, the corresponding value from the default value of fringe-indicator-alist is used.

To completely hide a specific indicator, set the bitmap to nil.

     left-arrow right-arrow up-arrow down-arrow
     left-curly-arrow right-curly-arrow
     left-triangle right-triangle
     top-left-angle top-right-angle
     bottom-left-angle bottom-right-angle
     left-bracket right-bracket
     filled-rectangle hollow-rectangle
     filled-square hollow-square
     vertical-bar horizontal-bar
     empty-line question-mark