Special:Badtitle/NS90:User talk:DocColress/The great big examples suggestion topic!/reply (32)

Go to the page of the User you want block, look on the sidebar, and you'll a block user option.

You'll be given a list of options to block a user for, like length of time, whether they can edit their talk page or not, etc.

Check the options you want, then block the user.

You can also use this to change the length of the block.