The Column Mode branch under Configuration - Editor has the following options:
No overstrike of unselected columns
If you never want overstrike mode to be used with column operations, you may select this option.
Overstrike if in overstrike mode
If this option is selected, the column operations operate either in insert mode (as default) or overstrike/overpaste mode based on the insert/overstrike keyboard setting. This is toggled by the Insert Key and shows up on the status bar. If in overstrike mode, cut/delete operations will remove the contents but leave spaces so that column data is not shifted. Paste operations will paste over the current position data and not shift columns either.
Always overstrike unselected columns
If overstrike mode is what you require permanently for column mode, you may select this option.
Automatically populate sort fields when in column mode
When text is selected in column mode and this option is selected, the column values for the current selection will be used to automatically populate sort fields in the Advanced Sort/Options dialog when the Sort function is invoked.
Paste into all selected columns when clipboard contains less than 1 line
If this option is selected, and a multi-line selection exists in column mode, a single string copied to the clipboard will paste to all selected lines. If this option is not selected, the column mode paste would only apply to the first selected line.