In the Activities tab, open the details of the activity you want to deactivate. Then, in the top right corner, click the Deactivate Activity button. Confirm your choice in the dialog box.

Activity detail - deactivate
In the Activities tab, select the Inactive Activities view.

Show inactive activities
Next, select the activity you want to reactivate and open its details.
In the activity's details, click on the Reactivate Activity button.

Activity detail - reactivate
Creating Activities
Activities are all the tasks in which your company spends time. These include internal activities, such as meetings, preparing proposals, etc., and also client work, such as creating a graphic design, programming, or meetings.
Creating a Client
Clients are your customers for whom you work on individual projects. For each project you create in Costlocker, it's necessary to assign a client.