From any screen in Keeper, there can be a 'Create Task' button or icon always on the top left or right. Similar to the chat button or icon on the bottom right of the screen.
When you click on the button/icon, a pop up window will appear asking what Client the task should be saved in (or even a Firm Task), then asking which section it should be saved in, and set due date, assignee, time budget, tag, attachments, etc.