How to export high quality images when exporting images sequence

Hello Everyone,

I am using COMSOL 4.3b and I do know it is possible to acquire images with somewhat higher quality using the "Snap shot" button but that only takes one image.

I am wondering if it is possible to export high quality images when exporting a lot of frames as image sequence?

I tried to increase the DPI when exporting image sequence but it seems that all it does is just making huge legends.