How to select all cells/anotations within another annotation (geometry)


I am working with a double stain of a skin biopsy. I have divided the biopsy into dermis and epidermis and detected/marked the 2 cell types of interest in these to areas (using the pixel classification tool and annotating each type). Furthermore i have divided dermis into 4 equally big sections. Now i want to isolate/select the specific cells/areas within each of the sections without having to classify the cells within each section again. Is this possible?

Most likely it is possible, but it would help to see what you are working with. Annotations can be generated and or overlap in different ways, so a snapshot and image of the hierarchy could allow for more specific suggestions.