Screen checks

Preface: why screen-checks?

Path of Exile doesn't have official addon/mod support, which means 3rd-party tools generally do not have information on what's happening inside the client, for example:
- whether the inventory or stash is open
- whether the player is accessing a full-screen interface
- whether the player is interacting with an NPC
screen-checks provide this kind of information and expand the feature-set a tool can offer, while also improving user-experience
- the gamescreen pixel-check allows the tool to automatically toggle its overlays and UI elements by adapting to what's happening on screen, removing the need for manual toggling by the user
- the integrated image-checks make a context-sensitive hotkey possible, i.e. accessing a multitude of features with a single hotkey (see omni-key)

this is where screen-checks have to be calibrated before using certain features
- red highlighting indicates that setup by the user is required
- this section will only show screen-checks of features that are actually enabled at the time
each screen-check has an info, cal, and test button
long-click info for instructions and follow them closely (this is important for repeatable and consistent results)

game updates sometimes include changes in interfaces or textures, which makes calibration data outdated
if you notice the omni-key not working correctly anymore, recalibration is the first thing you should try