very slow

 slow



 fast

visual effect 

zoom close

zoom open

wipe down

wipe up

wipe right

wipe left

venetian blinds

stretch from bottom

stretch from center

stretch from top

shrink to bottom

shrink to center

shrink to top

scroll down

scroll up

scroll right

scroll left

iris close

iris open

dissolve

checkerboard

barn door close

barn door open