@maksim.b, if you need to find a command, then you can look for it in the manual under the command reference. Because the commands name contain some part of what it is for, you can use the find tool in such cases. You start your search in an index (alphabetical or category). You click into the index with mouse pointer to activate the view focus. You open the find tool by classic key combination CTRL & ‘f’ together pushed. Then you insert a phrase of that what you are looking for ie. “save”. You start find. You check the found names and decide, which of them might match with your task. And then your read the description of the command. If it isn’t what you need you search for another command.