You will find the ARES Commander construction aids in the status bar. They are used for faster and more comfortable drafting.
First let´s talk about the Polar.
Polar (F10): If the Polar function is activated, dashed guidelines are displayed as construction aids on the screen. They appear temporarily during drafting and editing when the cursor moves away from the last specified point at certain predefined angles. Along with these guidelines, you can draw and edit more comfortably. You can define increment angles and additionally individual angles for the polar support.

The quickest way to access the settings for the respective construction aid tool is to right-click the corresponding button in the status bar. You will be taken directly to the right place in the Options dialog box.

A special construction aid is ETrack. It works together with ESnap and Ortho or better Polar:     ETrack + ESnap + Polar or ETrack + ESnap + Ortho
ETrack F11:  The ETrack feature works in conjunction with ESnap and Ortho/Polar settings, which both need to be activated to "track" a guideline from defined entity points, what is useful when creating new and editing existing entities. ETrack should only be turned on if you really need and use it.
To do this, the cursor is held over a significant point on an existing geometry (not clicked) and moved from there at an angle specified by Ortho or Polar. A dashed tracking guide is displayed temporarily.

Try an example

The task is to draw a side view of a plate.

Use the command “Line”.
Applying the activated construction aids Polar, ESnap and ETrack, the start and end points of the lines are "tracked" from existing geometry.
The construction aid QInput is not required and can be turned off.

Command access: Line

Specify start point:  Hover the cursor over the lower right corner point of the rectangle (do not click) until the endpoint is recognized. Now move the cursor to the right, away from the point and stay on the guide line. Click the desired starting point of the line.

 Specify next point: Hover the cursor over the upper corner point until the endpoint is recognized. Then move the cursor to the right apart from the point and stay on the tracking line. Click the second point vertically above the first.

Specify next point: Move the cursor to the right and stay on the tracking line, keyboard input: 10 (line length 10 for the 10 mm width of the plate)
Specify next point: Now move the cursor downwards from the point and stay on the tracking line.  Hover the cursor over the lower left point and track it. Click the new point horizontally next to the first.
Specify next point: Select the "Close" option to complete the contour.
Finde the whole case study for your training under this link: Case study 3: Steel plate

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