Install the plugin through Godot Asset Library (recommended). Or copy the godot_ui_animations folder into addons/ folder
Go to your Control node's script, specifically in the _ready() function and call UIAnimation.animate_slide_from_left() as an example.
Note
This add-on is currently in development, it may get future updates and improvements in the future.
Making the panel popup in the center of the screen
Popup.Panel.and.Shrinking.panel.code.mp4
func _ready():
UIAnimation.animate_pop($Panel)
animate_pop()
animate_shrink()
animate_slide_from_left()
animate_slide_to_left()
animate_slide_from_right()
animate_slide_to_right()
animate_slide_from_top()
animate_slide_to_top()
animate_from_left_to_center()
animate_from_center_to_left()
animate_from_right_to_center()
animate_from_center_to_right()