(Figured it out while typing this so sharing in case others run into it.)
After using Marquee tool to select, pressing Up/Down worked fine but Left/Right did not. It’s a keyboard shortcut context issue:
-
Up/Down were assigned to “Selection: Move Selection Content 1 pixel(s) up/down” with context “Selection” and “Go to Next/Previous Layer” with context “Normal”.
-
Left/Right were assigned to “Selection: Move Selection Content 1 pixel(s) left/right” with context “Selection” and “Go to Next/Previous Frame” WITHOUT context “Normal”.
Adding Left/Right to the “Go to Next/Previous Frame” shortcuts already assigned to comma ,/period . WITH context “Normal” fixed the issue ![]()