Importing an image to a picture
1. Select "Pic" > "Import bitmap to pic".
2. Browse to your file or have its contents in the Clipboard already. Notice how the left side has the bitmap, but the right remains blank.
3. Press Convert and see the result on the right for judgment. This is a separate step because it's Very Involved.
4. Tweak the settings and press Convert again until sufficient, then click Accept.
Importing an image sequence to a view
1. Select "View" > "Import image sequence".
2. Browse to either a single GIF file or a bunch of single-frame images. That's right, you can select more than one file at a time!
3. Note that the previews, left and right alike, show all frames in a grid. Misleading, I know.
4. Tweak the settings as you want and Accept.
That's how this is supposed to work, confirmed it myself just now.