answering my own question, you can select the DEFAULT selection mode (column or line), and then use ctrl key to toggle. column mode doesn't seem to be able to insert, but still its not a bad solution.
-mouser
Zeus does indeed have support for column mode cut and copy and it will quite happily do column mode inserting. In fact Zeus has column, block and line modes of cut/copy/insert.
For example assuming either the Brief or BriefEx keyboard mapping are set as the active keymap then Alt+C keys will select column marking mode. Similarly the Alt+M and Alt+L keys will select block and line marking mode.
But when it comes to cutting/copying and pasting of text I don't think there is anything that Zeus can not do.
Depending on mode in which the text is selected determines the mode that gets saved into the clipboard. So for example if you cut/copy in column mode text then any paste into Zeus will also be in column mode. Naturally, if you then copy the text as line mode then it will get pasted back into the document as lines of text etc.
The exception to this rule is if overwrite mode is active. In this case Zeus assumes no text is to be inserted, but rather the existing text should be overwritten.
Now these are the settings for the Brief and BriefEx keymaps but since the Zeus keyboard mappings are fully configurable, it is possible to re-map these or any other keyboard functions to any key combination.
As you have noticed Zeus also has a mouse marking mode. The default mouse marking mode is set to column mode but this can be easily changed to line or block mode using the Options Editor Options. Also mouse marking mode can be temporarily over-ridden by first pressing and holding the Alt or Control keys, while mouse marking.
But irrespective of whether mouse or keyboard is used to copy the text the same rules apply.
Finally, it is true that Zeus does not have any menus defined for these keyboard functions, but since Zeus has over 500 keyboard functions it is not possible to map all keyboard functions to a menu item.