In every program with folds (KUKA KRC / KUKA iiQKA, VKRC, Fanuc, ABB and Yaskawa) the editor shows where each expanded fold and each control block (IF, FOR, WHILE, PROC ...) begins and ends:

• Bars on the left margin: a thin vertical bar next to the line numbers runs from the first to the last line of every expanded fold. Nested folds are shown side by side (up to 6 levels); neighbouring folds of the same level change their colour (blue / orange), so two folds that follow each other are easy to tell apart. A collapsed fold shows no bar.
• Fold of the cursor: the innermost expanded fold around the cursor gets a stronger, darker bar and a light blue background from its first to its last line - you see at once where the fold ends.
• Dashed line (optional): a dashed line under the last line of every expanded fold on the top level.

The display only helps reading; it does not change the program and is not saved in the file.

Settings - Settings » Editor » Editing, group Folds:

Option	Settings key	Default	What it does
Show the range of folds on the left margin	Text_Editor/Fold_Range_Bars	on (true)	vertical bars from the first to the last line of every expanded fold (nested folds side by side, neighbouring folds in alternating colours)
Highlight the fold of the cursor	Text_Editor/Fold_Current_Highlight	on (true)	stronger bar and light blue background of the innermost expanded fold around the cursor
Dashed line under expanded top level folds	Text_Editor/Fold_Separator_Line	off (false)	dashed line under the last line of every expanded fold on the top level

The same settings can be read and changed by the editor command API with settings_get / settings_set, e.g. {"cmd":"settings_set","key":"Text_Editor/Fold_Separator_Line","value":true}.

KRC / KUKA iiQKA: how folds are edited - Editing rules for folds.