Four player items may be changed for multiple players at once or simultaneously.
Figure 1: Simultaneous edits.
Make simultaneous changes
Open Main Menu, click 1. Pre-Play and then click Manage.
Select a View Mode (Teams, Players, Substitutes) for performing multiple-player edits (see orange oval in Figure 2 below).
Figure 2: View modes
Click to place a check mark in the "all" box to edit all players (see Figure 3 below), or place a check mark to the left of each player you want to edit.
Figure 3: Check/Uncheck all
Click on the yellow pencil at the top left under the League Manager logo.
Make your selections and then click on the Save button.