Is there a way to keep the tooltip always showing while hovering over cell (i.e. like a timing property)?
I might not be correct here, but the tooltip is the operating system's tooltip reading the "title" attribute...so this would be an operating system setting...
If this isn't ideal, just look for one of the many thousands of javascript tooltip popups and use this instead of the grid tooltip. you can set the grid's tooltip to show never or something similar and then display it yourself...