符号的 封装 字段可以直接在符号的属性窗口中编辑。

Clicking the button in the Footprint field opens the Footprint Chooser, which shows the available footprints sorted by footprint libraries.

The Footprint Chooser filters footprints by name, description, and keywords, as well as any fields that are shown as columns, according to what you type into the search field. * and ? wildcards are available. The footprint search behaves the same as in the symbol chooser dialog.

If the symbol defines any footprint filters, the apply footprint filters option can be used to hide footprints that don’t match those filters. If the filter by pin count option is selected, only footprints that match the symbol’s pincount will be listed. You can choose to sort search results alphabetically or by best match by clicking on the button.

Single clicking a footprint name selects the footprint and displays it in the preview pane on the right. You can switch between a 2D and 3D preview of the footprint by clicking the and buttons. Double clicking on a footprint closes the chooser and sets the symbol’s Footprint field to the selected footprint.

当符号第一次被添加到原理图中时，可以为符号分配封装。

Some symbols are defined with a default footprint. These symbols will have this footprint preassigned when they are added to the schematic. If a symbol has a default footprint, the footprint will be graphically previewed in the symbol chooser dialog when the symbol is selected. For symbols without a default symbol defined, the footprint dropdown will say "No default footprint", and the footprint preview canvas will say "No footprint specified".

符号可以有封装过滤器，指定哪些封装适合与该符号一起使用。如果为选定的符号定义了封装过滤器，那么所有符合封装过滤器的封装都会作为选项出现在封装下拉菜单中。选定的封装将显示在预览画布中，当符号被添加到原理图中时，将被分配给该符号。

关于封装过滤器的更多信息，请参阅符号编辑器文档。

封装分配工具允许你将原理图中的符号与印制电路板布线时用到的封装关联起来。它提供了封装列表过滤、封装查看和3D元件模型查看，以确保将正确的封装与每个元件联系起来。

元件可以手动或通过创建等效文件（.equ 文件）自动分配到其相应的封装。等效文件是将每个元件与它的封装联系起来的查找表。

点击 工具 → 分配封装…​ 来运行该工具，或者点击顶部工具栏上的 图标。