Task: I would like to use office app to add a transition named "blinds" in to the presentation slide 
Steps:
click on the burger icon at the lower bottom of the screen to add transition 
click slide ( top sixth option ) on pop up window  at lower left corner of the screen to add transition 
click slide transition option ( last second ) on pop up window at the screen
choose blinds option on pop up window at the center of the screen
click app to all button at top the screen to insert transition in slide