You can name layers to make your work easier.
Open ① the Layer window and select ② the layer you would like to name.
Tap on ① "…" button and select ② "Rename Layer".
Tap on ① text field to enter the name. Once you are done, tap ② OK to finish naming it.
By naming your layer, you will find it easier to find your desired layer. This will let you work more efficiently.