To make a field visible on screen but non-printing, you should choose the "Visible but doesn't print" option in the "Form Field" dropdown on the General tab of the Field Properties dialog, though setting it to read-only won't hurt.
If you select "Allow Rich Text Formatting" on the options tab, you will be able to enter text into the field, open the Properties bar (Ctrl+E), and select the "Align Justified" button.
hmm... the screenshot attached shows the only options given to me by Text Field Poperties when using the "Select Objects" arrow
Are there options it is not showing me? That bar is the only one that comes up when pressing Ctrl+E
no Alignment button present.
When pressing "More..." it shows up the other Text Field Properties menu where the text is entered.
Look on the "General" tab for the display option drop down box for the field display.
Once you get the form field properties properly set and exit the "Form Editing" mode, you can the access the "Properties" tool bar.