What size monitor are you using? I assume you found the "mini-pointing finger" that lets you enlarge the individual tracks in the arrange window. And also the horizontal and vertical enlargement elevator sliders.
If you open a separate sample editor window, you can enlarge it to fill the screen.
My son learned Protools first. He likes Logic now that he's spent time with it. But he misses the individual pan controls for the faders in the mixer. And he misses the flexibility of rearranging tracks differently in the mixer than the arrange. Although you can rearrange the arrange tracks to rearrange the mixer appearance, Logic also has an "H" button that lets you not only hide mixer window faders, but it has a second feature that lets you hide both the arrange track and the mixer window fader.
Pressing the "H" button (next to the "walking man and to the left of the edit drop-down button in the arrange window) will add an "H" [hide] button on every track. Clicking one of the "H" buttons will hide the corresponding track in the mixer. Once it is green, if you hit the main "H" button (next to the "walking man"), the main "H" button will turn orange, and both the mix and arrange track will be hidden. In conjunction with 90 different "screen sets," you can achieve many different views.