You can use multiple options
1. Increase the amount of information displayed in the table
http://joxi.ru/V2VONOyCKbgLYAhttp://i.imgur.com/LvT3MVL.png2. When selecting, use
http://i.imgur.com/DhVUkSu.pngThus, it selects all filtered positions, the only difference is that when you select more than 50 items (select all, as in the screenshot), the System does not act immediately, but after starting the minute handler. That is, if you perform an action with more than 50 positions, then wait 1-3 minutes, the action should be completed.