Sorry, but there is something I would like to have specified : are these documents open in the UI, or are they already in the view ?
You say that you want to save documents "without going into each one of them". If they are already there and you're not editing them, then you have no need to save them.
Unless you want them to refresh, in which case an agent with the formula @Command([ToolsRefreshSelectedDocs]) will do the trick.
Pascal.