The Level window

Open the Level window by choosing level in the View window, then by clicking a mouse button anywhere in the signal window.

Show 

Choose how time and signal levels are displayed in the Level window using this menu. The four menu choices are physical units (absolute), physical units (relative), WFDB units (absolute), and WFDB units (relative). Physical units are seconds for time, and as specified in the record's header file for each of the signals. WFDB units are sample intervals and analog-to-digital units (adu). In relative mode, all measurements are shown as differences beween the current location and the reference location (which is determined by the placement of the `;' reference marker).

Time

This item shows the time corresponding to the most recent cursor position while a button was depressed within the signal window (and to the signal levels shown in the remainder of the Level window). Depending on the choice made using the Show menu, this item may be named Interval or Sample number.

Levels

Most of the Level window contains an informational display indicating the names and levels (amplitudes) of the signals. If an asterisk (*) appears at the end of any line, it indicates that the corresponding signal is uncalibrated.

This button makes the Level window disappear (until it is recalled by clicking within the signal window).