You can customize the layout of all tasks by clicking the Layout on the top navigation.
You can customize between 4 different page structure to best display content.
After picking a layout structure, you can drag the blocks around and add additional blocks to customize the look of a Task.
Clicking on a block will bring up the settings on the left side. You can press Remove Element if you no longer want it shown.
Currently, the Details block cannot be removed from the layout. However, you can hide them from all stages as a workaround.
A block can be configured to be shown based on the stage a task is on