Downloads manager
The Downloads manager can be opened by selecting the Downloads icon in the top bar of the window.
The Downloads manager displays the download and installations progress of any of your active downloads through the Unity Hub. It also displays any recent downloads that have completed.
If the installation process encounters any errors, you can either Retry or Cancel the download with the icons shown in the screenshot below:
To view the individual elements that are being installed, select the dropdown arrow on the left. To cancel the pending items at any point of the download/installation process, select the x button next to the group.