Pick first height and control settings for slope and distance on temporary magenta line.
In commandline are options to change settings:
Press key 'L' to set a fix value for elevation
Press key 'S' to set slope value
Press key 'D' to set distance between first and new height
Press key 'E' to set both elevation and slope to get new height
Press key Enter to continue with normaly modus
With all changes of settings is calculated directly new height on cursor.
Pick position for new height and in commandline get option to interpolate from last calculated height or from current height.
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