As we all know, there are file tabs in almost every CAD program, as shown in the following picture,

With those tabs, users could easily switch between different drawings and also create new drawings. However, some users may want to turn off the file tabs or they accidentally turn them off, as shown in the following picture, the file tabs are gone.

We can turn on the file tabs by entering Options, as shown in the following picture,

The Options dialog box pops up, as shown in the following picture,

We can switch on/off Display file tabs by checking the checkbox, as shown in the above picture.