The solution is to take some pictures of the subject with a higher magnification objective, overlapping slightly each field of view, then to reconstruct the subject from the picture elements with software. It's also a means to obtain a larger field of view even if the subject is completely in the field of an objective. If possible, follow DARK lines or DARK zones because edges are less visible. Place a corner of the dotted frame exactly on the paper mark. This method is NOT usable on distorting organisms like protozoans.
Areas selected have a white border.
Note that the stomach and gut are clearly visible on the right hand side. At the end you would probably think, it's pleasant to work on pictures. In addition to the 'cut and paste' method described above for joining images, some software packages also have a 'stitch' or similar function where points defined in two separate images with overlapping features can be auto-stitched. Picture Publisher v7.0 has this feature. Martin Mach's article's on radiolaria and diatoms also show stunning examples of microscopic images created by assembling smaller picture elements.