This guide will tell you how to enable Steam Overlay. Go through the guide and follow the simple steps to do so.
1- First, you have to launch Steam and click on the Steam button in the top left corner of your screen. A drop-down menu will appear. From that menu, you have to click on the settings and then click on the In-game button on the left side of your screen. On the right top of your screen, you will find the steam overlay options. You have to checkmark the enable steam overlay while in-game.
Under it, you will find your steam overlay shortcut key. After this, you have to click on OK to save the changes.
