Click on that object to select it, and select Copy under the Architecture Tab.

In the left panel, select the Mode dropdown menu.

Beneath Copy, there are four other options, namely:

To array an object with a fixed centre-centre distance along a straight path, select this option. Click on the base point of the object and move your mouse in the desired direction; while doing so, you will see a preview of the copies forming at a fixed inter distance, but the number of copies varying. Click on the desired target point of your final copy, to complete the array.

To array an object with a fixed number of copies along a straight path, select this option. Click on the base point of the object and move your mouse in the desired direction; while doing so, you will see a preview of the copies forming at a fixed number, but the inter-distance varying. Click on the desired target point of your final copy, to complete the array.

To array an object with a fixed radial angle subtended by each copy, along a circular path, select this option. Click on the base point of the object and click on the desired target point of your first copy. Move your mouse in the desired direction; while doing so, you will see a preview of the copies forming at a fixed inter angle, but the number of copies varying. Click on the desired target point of your final copy, to complete the array.

To array an object with a fixed number of copies, along a circular path, select this option. Click on the base point of the object and click on the desired target point of your first copy. Move your mouse in the desired direction; while doing so, you will see a preview of the copies forming at a fixed number of copies, but the inter angle varying. Click on the desired target point of your final copy, to complete the array.