Maximize window in tmux

tmux windows are limited to the size of the smallest client viewing any session they are linked to (that is, the window is part of).

This can be changed slightly with the aggressive-resize window option which constrains them to the size of the smallest client actually displaying that window.

To get the window back to full size, the best bet is to detach any other clients using that window. Use C-b D to select the clients individually or C-b: attach -d to detach all others on that session.

Setting aggressive resize option does indeed solve this issue for me (thanks Bob). I added the following to my .tmux.conf:

set-window-option -g aggressive-resize on