Let's try the first method. It's certainly the easiest even if not the most precise.
Select the company name by clicking on its frame with the Select Item tool C.
In the toolbar or in the Insert menu, choose the Rotate Item tool (R). When the mouse cursor is over a frame, the cursor transforms into curved double arrows.
Press the left mouse button and move the mouse cursor without releasing. You'll see a grey rectangle previewing the place of the frame and an information tip giving the exact value for the angle.
The Rotate Item tool helps you rotate any object while moving the mouse. The more your gesture will be controlled the thinner the result you'll get.
If you want to constrain the angle, just press Ctrl while dragging and you'll get a rotation multiple of 15 degrees as defined in the Other Properties option of the Tools category in Preferences. Turn until it is 90 degrees (which means six steps of 15 degrees)...