Guide positioning

Thank you all.  The "New Guide Layout" worked for what I need.  I had played with that earlier but didn't realize I could save and name a layout.  And then select that layout when recording the action.  Works just the way I wanted.  Every time I post here, someone has an answer that solves my problem.   Thanks again.

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@Lumigraphics wrote:

Guides can be scripted as well, you can get the document size and calculate where to place a new guide from that.

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Yes, that was my thought too!

I hit a brick wall on the syntax for an arbitrary unit override:

#target photoshop
var savedRuler = app.preferences.rulerUnits;
app.preferences.rulerUnits = Units.PIXELS;
var rightEdge = activeDocument.height.value;
var bottomEdge = activeDocument.width.value;
activeDocument.guides.add(Direction.HORIZONTAL, rightEdge - 25);
activeDocument.guides.add(Direction.VERTICAL, bottomEdge - 25);
app.preferences.rulerUnits = savedRuler;

In the above example, I'm working in the rulerUnits of Units.PIXELS – using a 25px "offset" from the right hand side and bottom edge of the canvas for the guide position. But what if the offset needed to be say 10% of the canvas? The syntax of the override for UnitValue() was tripping me up.

Followup question.  The "New Guide Layout" solved my basic problem.  I'm happy.  But I'm also curious.  The dialog seems to allow for specifying the color but no matter what color I specify, the guides are black.  Guides dragged out from the edges follow the colors selected in preferences.  I can work around the black guides, but why can't I specify the color since the dialog seems to offer that option?