I am glad you found what you are looking for!
But I’d like to emphasize again, there is the Display card which enables you to simply mouse over the card to display a much bigger version of the card without requiring you to do the zoom.
If you click this button on the upper right hand corner it will automatically show whatever card you are moused over in a large display picture to the left. You can also drag the corner of the card to make it larger.
You can see this in this video: YGO Omega Guide - Gameplay Tips and Tricks - YouTube