Comments

Ivan Lietaert wrote on 8/20/2014, 2:40 PM
Above the preview screen there is a button that says 'preview' with 4 options (draft upto best + auto/full/half/quarter). This affects the resolution of the preview screen.
thebrain900 wrote on 8/20/2014, 2:52 PM
I have it set to Best Auto and it says Preview 180x120

Why a small RES. can I go Higher?
Chienworks wrote on 8/20/2014, 10:44 PM
Vegas is merely resizing the preview image to fit in your preview window, which must be 180x120 or so. This will not affect the quality of the output video.

If you want your preview to be higher resolution, make the preview window bigger.
MSmart wrote on 8/20/2014, 11:07 PM
And don't use Best Auto, use Best Full or Good Full.

As mentioned, preview resolution has nothing to to with rendering.