SetDrawLayer
SetDrawLayer [/W=winName /K] layerName
The SetDrawLayer operation makes all future drawing operations use the named layer.
Parameters
Valid layerNames for graphs:
| ProgBack | UserBack | ProgAxes | UserAxes | ProgFront | ||||
ProgTop UserTop Overlay
Valid layerNames for page layouts:
| ProgBack | UserBack | ProgFront | UserFront | Overlay | ||||
| Valid layerNames for control panels: | ||||||||
| ProgBack | UserBack | ProgFront | UserFront | Overlay | ||||
There are really only three layers for control panels. ProgFront is treated as an alias for ProgBack and UserFront is treated as an alias for UserBack.
Flags
| /K | kills (erases) the given layer. | |
| /W=winName | specifies the named window for drawing. This must be the first flag specified when used in a Proc or Macro or on the command line. | |
Details
The Overlay layer is drawn above all else. It is not included when printing or exporting graphics and is provided for programmers who wish to add user-interface drawing elements without disturbing graphics elements. Overlay was added in Igor Pro 7.00.
Layer icon in the drawing tool palette: 
. A checkmark indicates the current layer. Non-drawing layers are indicated with gray text.
Output Variables
SetDrawLayer sets S_Name to the name of the previously-selected drawing layer. You can use this to restore the active drawing layer after programmatic drawing.