Tabs size on a Tabs Canvas

Hi!

I created a tab canvas and exported it to Power Point. The problem is that some of the tab titles are "abbreviated". for example, INTERACTI..... instead of INTERACTIVITY, however there is plenty of space for the tabs with the full titles.

How can I make the size of the tabs bigger to make up for the Power Point limitatin, or how can this be solved?.

Thanks for any help