I have a picture made by LO Drawing and I need to move it to jpg-format/ Is it possible?
Never post twice: you confuse contributors. Your result is answers have been attached to both occurrences, compelling you to look at both. And you could get contradictory answers without being able to detect this if you don’t read both!
Duplicate at 278326/how-to-save-a-picture-in-lo-drawing-as-jpg-picture
Yes, you can. See the menu item File - Export.
Note that the exported file is no longer editable as a Draw file (for handling the individual drawn objects). It is flattened to a fixed resolution pixel map. If you want to use this for further work, or it is itself a work in progress, save your file as a LibreOffice drawing (odg) also.