How can I remove the small calendar pane in the bottom left of Zimbra Desktop so that I can see just the email

I am using Zimbra in conjuction with Gmail and I found the font of inbox etc ridiculously tiny so had to use cntr+ to be able to read folders which meant some are now hidden behind the calendar which causes painful scrolling just to be able to read folders etc

Also is there an alternative to using cntrl+ as using it increases the size of everything including the note inviting me to undo a deletion (which is frankly very distracting) and pointless in any case?