Angles start where the application says, to the right or at the top, and run counterclockwise or clockwise, because a compass and a mathematician disagree. The radius axis can start below zero, so a pattern in dBi reads its floor at the centre. Markers name a point, such as the keyphasor pulse on an orbit, and a cursor at an angle reads every plot's radius there.
Probes at 45 degrees either side of vertical on a turbine bearing. The raw orbit carries the 1x unbalance, a 2x component from misalignment and probe noise; the filtered orbit keeps the 1x. The keyphasor pulse once per revolution is the marker, so the orbit can be read against the shaft's position. Press Rub to see the flattened orbit a light rub produces. Click the plot to read both orbits at an angle.
The peak-to-peak amplitude and the 1x phase are read from the same samples; a change of phase at constant speed is what a crack shows first.
The E-plane pattern of a horn in dBi, with the radius axis starting at -40 dB so the side lobes are readable, and the run-out of a shaft journal from a dial indicator at every 10 degrees, in micrometres about the mean radius.
Keyboard: the plot is a tab stop. The arrow keys move the cursor by one degree, with Shift by ten; Home returns it to zero. The legend is one tab stop where Enter or Space hides and shows a plot. The markers and the cursor readings are text under the plot.