Once "Library A" has been imported as a dependency in the current project, how can...

The Object Repository is a feature of UiPath Studio that allows you to store and manage UI elements in a structured way, similar to a DOM (Document Object Model)1. The Object Repository can be created and used in both libraries and processes2. When you import a library as a dependency in a process, the Object Repository defined in the library will automatically be available in the process3. You can access the UI elements from the library by using the UI Activities tab in the Object Repository panel3. You can also drag and drop the UI elements from the library to the Designer panel3.