View the member's profile. (This can be done by clicking the Members List link towards the bottom of the main page of your forum and then browsing for the member's profile, or by clicking the user's username wherever it is visible on the forum.)
Click the "Delete" link in the member's profile. If there is no "Delete" link, that means the logged in user has not been assigned as an administrator.
On mobile devices and in some themes, click the (main menu) icon located towards the top left corner of the page. Skip this step if you don't see the icon.
Click the Members link.
Check the checkbox next to each member you want to delete.
Select Delete in the
dropdown box located towards the bottom of the page.
Press Ok to confirm that you would like to delete the selected members.
The Members link may not be visible if the Members List option in the Settings -> Display section is turned off. In that case, you can visit the direct address to your Members List: http://FORUM_ADDRESS/register/members (Replace FORUM_ADDRESS with your forum's web address shown in the Admin dashboard.)