For the meshing dialog in the latest beta just start typing, don't click in the field.

Pressing TAB jumps to the next field, shift+TAB moves back through the fields.

I think this works for other fields too (just tried it in the edit size ones too) - as long as you don't click in the field then TAB will work.

Micheal,

Is it possible to have the field that has the initial focus have highlighted text?