---
title: "Appendix"
url: "https://help.maxon.net/c4d/en-us/Content/html/6193.html"
section_path: "Appendix"
description: "If you receive error messages (e.g., \"Cannot open file\") when importing files from foreign formats (e.g., *.csv files in the Structure Manager), this file …"
---

# Appendix

> **Tip:** Tip:Note the important and practical keyboard shortcut `CTRL`+`F1` when you move the mouse over a parameter or menu entry. This will take you to the corresponding help section. It couldn't be quicker!

> **Tip:** Tip:If you use OSX Mojave, the Color Chooser's **Color Picker** can be disabled (grayed out). In order to make it possible for Cinema 4D to access the Color Picker, open the Mac system settings here: **Security/Privacy**. Add the executable Cinema 4D start file here.

> **Tip:** Tip:Make sure not to modify the installed program folders or their contents in any way (the only exception: The plug-ins folder - plug-ins can be placed here as usual)! If any modifications are made your software will not function properly! All user-specific information is saved to the [user directory](https://help.maxon.net/c4d/en-us/Content/html/5244.html.md), including Content Browser libraries and similar elements.

> **Tip:** Tip:If you should encounter instability when starting Cinema 4D (which mostly occurs in conjunction with the [GPU-Framework](https://help.maxon.net/c4d/en-us/Content/html/PREFSOPENGL-PREF_OPENGL_MAIN_GROUP.html.md)), quit Cinema 4D and restart Cinema 4D with the `Ctrl/Cmd` key held down until the messages **Shift+Ctrl**: Use Minimum Viewport Settings appears. Cinema 4D will then start with reduced settings (that you can increase again using the Main menu: Edit|Preferences|Viewport Hardware setting).

# Additional useful information

If you receive error messages (e.g., "Cannot open file") when importing files from foreign formats (e.g., \*.csv files in the Structure Manager), this file might already be open in a different application. This program will prevent the file from being opened in Cinema 4D. Close that application (e.g., Excel) prior to importing the file into Cinema 4D.

- If you use multiple graphics cards and monitors, we recommend connecting all monitors to a single graphics card. Otherwise you may experience performance issues with Cinema 4D.