Highlight oversized images

Highlights images that are using too much memory
    by inverting colors and flipping them.

Inspecting a widget

You can browse the interactive widget tree to view nearby
widgets and see their field values.

To locate individual UI elements in the widget tree,
click the Select Widget Mode button in the toolbar.
This puts the app on the device into a “widget select” mode.
Click any widget in the app’s UI; this selects the widget on the
app’s screen, and scrolls the widget tree to the corresponding node.
Toggle the Select Widget Mode button again to exit
widget select mode.

When debugging layout issues, the key fields to look at are the
size and constraints fields. The constraints flow down the tree,
and the sizes flow back up. For more information on how this works,
see Understanding constraints.

Flutter Layout Explorer

The Flutter Layout Explorer helps you to better understand
Flutter layouts.