My logo is too small, slider is at max, anyway to adjust?

My logo size is very large and I have the size slider set to max but it still looks very very small. Anyway to adjust the size to make it larger?

Just click the value to the right of the slider and type in a whatever you want.

You sometimes need to click TAB on your keyboard to see the change reflected on the page.  

Also, check that your logo isn't laid onto a transparent background with lots of invisible padding - you should crop out the dead space.