A query on diy digital oil painting

The things listed in your picture are all gadgets for future use:

1. A small cylindrical container is filled with light green liquid = liquid level gauge (also called horizontal bubble), which is a simple instrument for measuring the levelness of picture frames when hanging pictures. Put the level on the picture frame, as long as the bubble is in the middle of the level, it will hang flat.

2. The milky white liquid in the paint box = brightener (to enhance the brightness of the picture, it is usually painted after painting, which is toxic and irritating, so please use it with caution).

3. Small plug = seamless hook (nail three nails to the wall with a hammer to hang a picture, but this thing is said to be seamless, but it will actually hurt the wall. It is better to hang the hook with a suction cup)

4. Supplement: The contents of the bag are nailed to the inner frame batten with tired silk, and the triangle can be hung on the hook of seamless hook.