# 4.1.6: 默认程序设置

在启动时，Karamba3D根据**“karamba.ini”**文件中所列出的值设置其默认外观和行为。该文件位于Karamba3D安装文件夹中（双击Karamba3D桌面图标即可找到该文件），用户可使用任何文本编辑器打开并操作该文件。该文件通过语法规则描述定义默认设置。其后的每个段落均包含对相关特定属性及其默认值的含义、作用等的描述。这些设置均可被更改：

* 物理单位制（“公制”或“英制”）
* 限制距离以对齐相邻节点
* 重力加速度的值
* 垂直方向的极限倾斜度
* 输出值的数字格式和显示属性
* 默认材料属性
* ...

如果用户希望在从一个版本的Karamba3D升级到下一个版本时保留对上述设置的更改，可将初始化文件重新命名为**“karamba\_user.ini”**。但这会导致新引入属性丢失的风险。在这种情况下，硬性连线的默认值将取代它们。

{% hint style="info" %}
需启用管理员权限才能覆盖原始的**“karamba.ini”**文件。
{% endhint %}


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