As the Vivado IDE initiates the process to run synthesis or implementation, it reads design files and constraint files in preparation for the run. The Starting Run dialog box, shown in the following figure, lets you move this preparation to the background.
Putting this process into the background releases the Vivado IDE to perform other functions while it completes the background task. The other functions can include functions such as viewing reports and opening design files. You can use this time, for example, to review previous runs, or to examine reports.