Draft Coordinates/zh-cn

描述
在底图工作台工具中，您可以通过指针单击3D视图来拾取图形中的点、距离、半径与角度.

但是，当这些参数需要特别精准时，可能就要在工具对话框中输入精确值.

此时可能会涉及两个有关的界面：任务视图（taskview）与命令工具栏. 菜单中默认选择的界面为：.

任务视图面板
任务视图面板是一种随具体所用工具而改变内容的智能窗口，且需要用户对其进行输入. 例如，当使用底图圆形工具时，此面板将请求用户输入中心点，以及半径值. 此二参数可通过在3D视图中选择点或以输入数值的方式来加以描述.

当您看到任务视图上的输入栏时，就可以为之输入数值；再者，您也将在此看到鼠标指针移动过程中相关数值的改变.
 * 按下 或 键可将光标依次移至X、Y、Z字段；当光标位于Z字段时，再按下键即输入完成，并记录下当前设置的这个点.

Depending on the specific Draft tool under use, there may be other options available.
 * Press to switch between absolute and relative coordinates.
 * Press to switch between normal mode and continue mode.
 * Press to switch between wireframe mode and filled mode.
 * Press to switch between original mode and copy mode.





Command toolbar


The Draft command toolbar is an intelligent toolbar that changes its contents according to the tool being used, and the input required from the user. For example, when using Draft Circle, the command toolbar will ask you for the center point, and then the radius value. These two parameters can be indicated by either picking a point on the 3D view or by entering numbers.

Whenever you see input fields appearing on the command toolbar, you can enter numbers in them; moreover, you will see that those numbers reflect the movement of the pointer.
 * Press or  to advance to the X, Y and Z fields; pressing  when in the Z field will record the point.
 * Press to switch between absolute and relative coordinates.
 * Press to switch between original mode and copy mode.
 * Press to lock or unlock the Z coordinate.

Locking the Z coordinate


It can be hard to align objects when working in 3D space. For this reason, you can lock the Z coordinate so you'll be certain that everything you draw will lie in the same horizontal plane. When you open FreeCAD, the Z coordinate is locked by default at 0.00, but you can change this; just unlock it, change the Z value, and lock it again. If the Z coordinate is locked, you won't be able to draw in non-horizontal planes.

Most Draft tools work in the working plane defined by Draft SelectPlane. Therefore, it is usually not necessary to lock the Z coordinate, just establish the correct working plane.

Set the number of decimals
By default, FreeCAD shows two decimal places in quantities. To change the number of decimal places shown change the preferences:
 * Go to, and set "Number of decimals" to the desired value.
 * Then press and.

Another way is using the parameter editor:
 * Go to, and change the "Value" of "Decimals" to the desired number.
 * If "Decimals" doesn't exist you can create it; right click in the window and select, type in "Decimals", and proceed to enter the desired number.
 * Then click and.
 * Restart FreeCAD to activate your changes.