There are several ways to modify bugs status:

• Open the bug for editing and in the Edit Bug dialog select the desired status from the Status drop-down list and, if necessary, select the resolution from the Resolution drop-down list.
• Select the bug in the Bug Table and select one of the values from the Workflow drop-down list on the Bug Toolbar.
  
  
  
  
• Use Status and Resolution distributions to change bug status or resolution. Select the bugs in the Bug Table and drag them to the required sub-query.
  
  
  
  

  Be careful when changing bugs status this way. Some operations are not allowed by the workflow rules. For example, you are not allowed to change the status from Resolved to New. You can do it using the drag-and-drop function, but only locally. Once you try to upload this change to Bugzilla, an error will be detected and you will be prompted to resolve the problem.