Two options for selecting several oocytes at the same time:

You can use this functionality only for one day (one column). Edit the oocytes of every day separately.

This functionality is a considerable time-saving if you froze oocytes or give all (a lot of) oocytes the same state.

1. Press the Ctrl key and select the wished oocytes of one day.

 

2. Click the first oocyte, press the shift key and click at the last wished oocyte. Every oocyte between both will be selected too.