VI Basic Operations TOOL3 Measuring Two-point Distance or Entering Information—TOOL Menu- 67 -3.2 What is an Overlay?An overlay is something like a transparent sheet that is placed on top of a photographed image.Text, count markers, pen drawings, measurement lines, or superimposed images can be writtenon the overlay. The contents written to the overlay can be saved or printed along with theimage.Basic method of overlay operationAll pen drawings, text input, etc., for an image are written onto a single overlay sheet.Follow the sequence shown below to create an overlay.Choose the function↓Draw or enter text↓→To redo, clear before redrawingPasteWhile you are drawing, the overlay is simply held in temporary storage, so its layout will not befixed as valid data unless you paste it to the image. If you click to return without pasting,the content you’ve drawn will be lost.Once the overlay is fixed, you can choose to display or hide it by using Overlay ON/OFF .Displaying or hiding the overlayOverlay ON displays the overlay on top of the screen.Overlay OFF hides the overlay from the screen.Even while Overlay OFF , if you press any icon to draw on the overlay, e.g., Pen orText , the overlay will automatically reappear.Erasing the overlayPress Clear All , and Y/N will appear asking you to confirm whether or not to erase.Press Y if you want to erase or N if you do not.You cannot partially erase an overlay. All pen drawings, count markers, text,measurement lines and superimposed objects will be erased. Crosslines and scales,however, will not disappear.Saving or printing the overlayIf you save or print an image while an overlay on it is being displayed, the overlay imageis written over the photographed image when it is saved or printed.In this case, the photographed image and the overlay are integrated into a single imagewhen saved, so you cannot erase the overlay from the saved image.If the overlay is hidden while you save or print, only the photographed image is saved orprinted.• Some text may be dropped when saving an overlay over an image if you save at theminimum file size.Furthermore, if the image is saved in JPEG format, we recommend selecting a lowcompression rate such as Fine or Normal.• For details, refer to “1.4.2 Image File Settings－File Settings” in Chapter VI.
