Hovering the mouse cursor over the headers' separator line that contains hidden columns, depending on the mouse position over the separator, you may click-and-resize either the visible column to the left of the separator, or the rightmost hidden column (making it visible). Steps: 1. In a spreadsheet, select columns B-E, right-click in the selected header area, and click "Hide Columns". 2. Hover the mouse over the boldened vertical separator between "A" and "F". It's uniform when you hover there (in my theme, it's just <->). 3. When it's in the leftmost position where it's still <->, click-and-drag => see that this resizes column A when you release the mouse 4. Repeat 2, and click-and-drag when it's in the *rightmost* position still showing <-> => see that it resizes (unhides) column E The problem is, that there's no visual indication to distinguish between 3 and 4 before you click, drag and release. In MS Excel, for instance, the mouse cursor changes between <-|-> (for 3) and <-||-> (for 4).
Created attachment 167413 [details] Screencast The screencast shows the same operations in Excel 2016 and Calc 7.0.3.1. It shows that in Excel case, the cursor changes between the two modes, when in Calc case, the cursor is same in both modes.
I like this <-||-> vs <-|-> differentiation (and the better visualization than our bold line between header cells). Let's do it.