PICKFIRST is a system variable that’s used to control whether we can select objects before we start a command.

When the PICKFRIST system variable value is 0, which means the PICKFIRST is off and we cannot select objects before we start a command.

When the PICKFIRST system variable value is 1, which means the PICKFIRST is on and therefore we can select objects before we start a command.

Value	Description
0	Pickfirst not available; unable to select objects before we start a command
1	Pickfirst available; able to select objects before we start a command

How PICKFRIST works

1. Enter “PICKFIRST”, as shown in the following picture,

2. Then press Enter key, as we are prompted to “Enter new value for PICKFIRST”, we can see the system variable is <1>, as shown in the following picture,

3. Since the value is 1, which means PICKFIRST is available;

4. Select objects that we want to erase > Enter ERASE > press Enter key > what happens next is that the objects are gone as long as we execute the ERASE command