From bug 143919 diagonal borders are accessible in Toolbar>Borders. There's Undo problem here: Open a new calc sheet Mark some cells Apply borders to the cells: Criss-Cross Border Undo once to remove the borders - Borders are half removed (wrong behavior) Undo once more - Border are fully removed If diagonal borders are created via Format-Cells-Borders, Undo pressed once removes them properly. If diagonal borders are created via Toolbar>Borders, Undo should removed them with a single click.
Thanks Timur. With criss-cross, sometimes even two undo actions are not enough and some diagonal "borders" remain with no undo action left. With "diagonal up" and "diagonal down", only one undo action is available, and sometimes it removes everything, sometimes only a part, sometimes nothing. Tested with both the toolbar and the sidebar. Version: 7.6.0.0.alpha0+ (X86_64) / LibreOffice Community Build ID: feda414f8b70f50a9f6745d2ce8828316d4711cd CPU threads: 8; OS: Linux 5.15; UI render: default; VCL: gtk3 Locale: en-AU (en_AU.UTF-8); UI: en-US Calc: threaded
(In reply to Stéphane Guillou (stragu) from comment #1) > With criss-cross, sometimes even two undo actions are not enough and some > diagonal "borders" remain with no undo action left. > > With "diagonal up" and "diagonal down", only one undo action is available, > and sometimes it removes everything, sometimes only a part, sometimes > nothing. As noted in bug 153644 comment 3, the behavior varies, depending on: * how many adjacent cells are selected, and on * whether you perform the action by using the toolbar icon or instead by using the full cell format dialog, and on * which exact of diagonals are initially applied (i.e. both vs. "one" only vs "the second" only).
*** Bug 158748 has been marked as a duplicate of this bug. ***