How to speed up thumbnails view in Acrobat Reader?

If you widen the thumbnail view, more thumbnails image would be visible and they are organized into rows and columns.

If you think that the thumbnails seem to be displayed too slowly, you can try to select 'Embed All Page Thumbnails' from the Options (or Thumbnail) menu. Then Acrobat will save these thumbnail images into the PDF file. You may undo this feature by selecting 'Remove Embedded Thumbnails'.