Adjusting menus

[Rich Shepard <rshepard appl-ecosys com>]

  I'm switching from LibreOffice's Calc to gnumeric and have a question
about the menus at the top of the frame.

  By default, there are three rows of icons left-aligned with a lot of space
to the right of each row. How can I move at least one of the bottom two rows
up to the top row and gain an additional line or two for data?

Rich