Adjusting relative layer sidebearings with keys changes glyph sidebearings

Glyphs
1

Using the keyboard to adjust relative LSB/RSB values per layer seems to be a bit flaky – it often reverts to adjusting for the whole glyph. This seems like it must be a bug.

Steps to reproduce:

  • Open a font with multiple layers
  • Open a component glyph with automatic alignment enabled in Edit View
  • Set one of the sidebearings to a value like =+50 to add 50 units to the sidebearing inherited from the component in all layers in the glyph (you can switch layers to confirm that it’s set everywhere)
  • Set the sidebearing to ==+100 to add 100 units to the inherited value only for the current layer
  • Put the cursor back in the sidebearing field you just changed and use the ▲/▼ keys (with or without ⇧) to adjust

The result: The double == changes back to a single =, and the value is updated in all layers instead of only in the current layer.

As far as I can tell/test, it seems that if you then add the extra = back in and try again, then it works as expected. It’s only the first time you do it that it fails.

2

Works fine for me.