Patent ID: 8854398

Claim:
A waveform observing apparatus with a touch panel in a display section that allows a handwritten comment to be written on a displayed waveform by use of the touch panel, the apparatus comprising: a compression setting device for setting a compression ratio of a waveform in a time-axial direction; a memory device for storing a first handwritten comment in association with a position where the handwritten comment is inputted, the handwritten comment is inputted by means of the touch panel when a waveform is displayed on the display section at a first compression ratio; and a displaying device which displays with the waveform the handwritten comment in the position where the handwritten comment is inputted, if the compression ratio of the waveform is the same as the first compression ratio or within an allowable range for displacement of an image of the handwritten comment and a simple indication which indicates a presence of the handwritten comment, instead of the handwritten comment, in the position where the handwritten comment is inputted, if the compression ratio of the waveform is a second compression ratio that is different from the first compression ratio and outside the allowable range.