Below are the steps required to make a double-switch (replacing 2 players at the same time but switching their places in the batting order). Usually a double-switch involves a pitcher and some other fielder so that's the example we'll use below.
Jones (the pitcher) and Smith (the right fielder) are currently in the lineup. Smith is batting 8th and Jones is batting 9th.
8 - Smith RF
9- Jones P
The manager decides to make a pitching change and decides to make a double-switch because Jones will be the lead-off batter in the next half inning. The new pitcher will be Jackson and the new right fielder will be Parsons. Jackson will bat for Smith and Parsons will bat for Jones. This way Parsons will be the first hitter in the next half inning and Jackson will be the last. We want the lineup to look like below.
8- Smith RF
Jackson P
9- Jones P
Parsons RF
To do this in BallScore you actually insert the players just like any other new players. The only difference is you are inserting 2 players at the same time. Here we are assuming the switch takes place while the new pitcher is being inserted which is usually the case. Simply follow the steps below.
1) Press P (insert new pitcher) then select the pitcher you wish to insert. Click OK.
2) The following dialog appears, click Yes
3) When the RLM appears Jackson should already be selected and the pitchers position should already be selected. Click the first available slot of the 8th batting order position which is where we want to insert Jackson. Click Place selected player then click Ok for Duplicate position.
4) Select Parsons from the roster list and RF from the position list. Click the first available slot in the 9th batting order position which is where we want to insert Parsons. Click Place selected player then click Ok for Duplicate position.
5) Click Accept & Exit.
6) The Current Defense screen will appear with Jackson already selected in the pitching position. Select Parsons for right field then click Ok. Click Yes.
The New Batter Markers should already be inserted but always check that they are in the correct cell.