Android 9 Patch tool: What is the new layout bounds feature? -

I updated the Android SDK R20 and started 9 patch tools.

It seems that a new feature - Control Holding and clicking, has layout limitations that are referred to as red pixels

I have taken a look at this but it is old looks like.

My question is, what is the range of layouts used and what is the best way to use them?

Thanks

Editing: Supported in Android 4.3 (API Level 18). view by.

Basic: This is not a document because it is not part of the OS, there are only tools. Red pixels are not used by the Android Framework (according to Jelly Bean 4.1.1) to set the layout limit, so do not set them at this time. You can estimate where your image should be the limit of the layout of control, It can be guessed what it means. See for more announcements.