Use the Application-Settings dialog-box to edit parameters and the working environment.

Open Application-Settings dialog-box


- or -


1.Click Edit toolbar > Application-Settings

The Application Settings dialog-box is now open.

Application-Settings dialog-box:


Application-Settings are saved automatically to:


See here for more information on Application-Settings, Themes, Styles and the Save and Load buttons

Application-Settings tabs



 CAD Linear Units 

Imported DXF Files: Default Units

For 1:1 scaling, make the units the same as the original DXF drawing. See also: 'Edit a DXF-Element'

 File Options 

Extract ZXL Files to: (See here for ZXL file-type).

automatically to ZXL sub-directory A sub-directory to the path of the ZXL file is created and all of the miles are saved to it
Specify directory I recommend you select Specify Directory. I usually specify the same path as the ZXL file itself. But I can also select or create a new path.

Enable Auto-Save check-box:

Select to continually overwrite the file with the active model.
De-select if you do not want to overwrite a model.

Note 1: Before Auto-Save becomes active, the model must have a file-name. For new models, do File menu > Save.

# of Backup files

When you open a model, a backup is made with file-extension: CXL.1, .2, ... CXL.#;  and MTD.1, MTD.2, ...MTD.#

# of Commands between each Auto-save

After # (number) of changes to the model, we auto-save your model. We:

1.Rename the active file-name.CXL and file-name.MTD to file-name.~CXL and file-name.~MTD
2.Save the active file to file-name.CXL and file-name.MTD

Tutorials Video Directory : see Tutorials

Database Directory : DO NOT TOUCH! see Help menu > Language Database

Allow Internet Downloads : check-box, needed to download tutorials

 Cam 'Soft Limits'  

Cam Radius-of-Curvature (Rc ∕ Rf)%

Equation to Evaluate : (Cam Radius-of-Curvature, Rc  ∕  Cam-Follower Radius, Rf ) * 100 %

If  | Radius-of-Curvature Cam | < % * Radius of the Cam-Follower Roller

The Cam-Roller may not be able to contact the cam because of undercutting.
The Cam track becomes red in the graphic-area.

 Theme Options  Themes are not Styles.

Active Theme: After you select a Target Theme, this shows the Theme. Mostly, in this help documentation, the Theme is Charcoal Dark Slate.

Target Theme:

Windows Do not Select
Charcoal Dark Style (default)
btn_delkeywordNumber Format  


Note: Digits and Precision are similar to Decimal Places and Significant Figures, but not identical.

Note: Precision of internal calculations do not change.

 Data Output and Vector Format 

Data-format for data you save from a Graph FB or Cam-Coordinates FB.

Float Number Format: See Globe-www Internet Link here about number formats
Precision and Digits - see below

 Dimension Format 

Data-format for dimensions, as you see in the graphic-area

Precision and Digits - see below
Dimension and Vector Font Size - experiment (usually 14 is OK)

Top-Tip: Experiment with a dimension to learn how Precision and Digits change the dimension.

Precision: The number-of-digits for the full number - before and after the decimal mark.

Digits: The number-of-digits after the decimal mark.

Typically: Min(Precision) ≥ (Digits +3), but depends on your model requirements.


~ 1234.56789





























 Display colours 

Edit the colour of elements and symbols in the graphic-area.

To help you model, the elements - below - have different colours in different states.

Parts in the Mechanism-Editor:

Blue Part-Outlines when the Part is not a kinematically-defined Part (Part Not Solved)
Green Part-Outlines  when the Part is a kinematically-defined Part (Part Solved)

Sketch-Elements in the Part-Editor: are

Blue: when NOT Geometrically Defined
Black: when fully Geometrically Defined

CAD-Lines are Dark-Green in the Part-Editor and Mechanism-Editor.

XY-axes in the Mechanism-Editor and Part-Editor are:

Orange: X–axis arrow
Green: Y–axis arrow

XYZ-axes (RGB) at the Origin in Model-Editor (RGB):

Red: X–axis, Green: Y–axis, Blue: Z-Axis

Reference Geometry: Orange

 Display Options 

Quality Slider: Low < Quality > High

Use the 'Quality' slider to edit the drawing accuracy of various symbols and sketch-elements.

Display Function-Block 'Name'

To display the name of each Function-Block in the graphic-area it is useful to display the names of Function-Blocks

It is more useful when you rename the Function-Blocks

No FB names

No FB names

Default FB Names

Default FB Names

Re-named FBs

Re-named FBs




Toolbar Icon Size

Large 48x48 - not recommended as you may not see all of the icons in a toolbars

Medium 32x32 - typical use

Small 24x24 - typical use

Tiny 16x16 - too small for me

English (An English Joke about language)

Languages: English, Italian, German, French, Spanish, Portuguese, Dutch, Polish, Russian, Japanese, Chinese.

Show Hints

See also Help menu

If you do not need the hints, clear the Show Hints check-box. We still show hints in the Feedback zone.

Text Size

Text in Menus and Dialog-Boxes. They are related to the Icon Size

Large - too big

Medium - OK

Small - a bit small.


Symbol Display Size (Pixels): The size of elements in the graphic-area, such as Part-Outlines.

Symbol Selection Size (Pixels): The size of the pointer selection pin-head. The larger this number the easier it is to select an element, but you may select than one element.


Sounds Enabled: check-box to let you listen to a sound each time MechDesigner sends a message to the Message Area in the Feedback-Area.

Click the buttons to hear the sound for each message.



 Default Sizes 

Parameters that apply to Solids. You can change all four in their dialog-boxes, also.

Default Ball Radius

The size of the symbol we use for a Ball-Joint

See also: Add Ball-Joint ; Ball-Joint dialog

Default Bearing Dia.

Default Ground Bearing Dia.

The dimensions that apply to arcs and circles of Auto-Profiles with respect to moving and fixed Pin-Joints, respectively.

See also: Add Auto-Profiles

Default Extrusion Depth

The default dimension of the Extrusion-Depth parameter in the Extrusion dialog

See also: Add Auto-Profile ; Add Auto-Profiles ; Extrusion dialog-box

tog_minus        To Save, Load and Distribute Application-Settings and Themes

STEP 1: Edit menu > Application Settings > General tab > Style Options ...

Target Theme set to: Charcoal Dark Slate or Windows10

If Target Theme = Charcoal Dark Slate : Click Load button, open the DARK.STYLE style.

If Target Theme = Windows10 : Click Load button, open the LIGHT.STYLE style.

The Dark and Light styles use colours that suit the Charcoal Dark Slate and Windows10 themes, respectively.

STEP 2: Edit menu > Application-Settings ...

Edit colours, icons sizes, text sizes, number format, and all other settings.

When the settings are 'good for you'...

STEP 3: Re-start MechDesigner.

The Theme and Application-Settings should now be your default settings.

To distribute your settings and style to other workstations:

1.In the workstation with the settings you want to distribute: Click the Edit menu > Application-Settings > Save button to save your settings to a style: file-name.XML

Save file-name.XML to this directory <CommonAppData>\PSMotion\Style

2.Distribute the file-name.XML to the other workstations.

Copy file-name.XML to directory <CommonAppData>\PSMotion\Style

3.On the other workstations, in MechDesigner, click the Application-Settings > Load button to load file-name.XML as the new style.
4.Exit and Restart MechDesigner to make sure the new settings and style are applied and saved to MechDesigner.ini


Tutorials and Reference Help Files for MechDesigner and MotionDesigner 14.2 + © Machine, Cam, Mechanism, and Motion Design Software by PSMotion Ltd