Use case or problem
When creating a table, it is required at times to merge cells, horizontally or vertically. Plain markdown does not support this. Merged cells must appear merged in both reading view and live preview.
Proposed solution
Adopt one of the non-standard ways to declare merged cells in markdown tables. For example, a cell whose only content is the < character could be merged to the left, and a cell whose only content is the character ^ could be merged to the top.
A context menu option and/or a command to merge/unmerge table cells could also be useful.
Display merged cells correctly in both Live Preview and Reading View.
Current workaround (optional)
No good workaround exists. Existing plugins only support Reading View.