在PCB設計的過程中，會采用子產品複用的方法以提高PCB設計的效率。那如何進行子產品複用呢？
1、先建立複用子產品
（1）選中要複用的器件、導線、銅箔等。然後滑鼠右鍵選擇→建立複用子產品
（2）點選建立複用子產品後，跳出建立複用子產品對話框。填入複用子產品名稱
（3）儲存複用子產品在檔案夾下即完成。
2、在目前項目中 添加複用子產品
（1）在ECO工具欄下，點選添加複用子產品
（2）選擇剛才儲存的複用子產品
（3）在調入的過程中出現警告可以忽略。選擇是。
選擇是
确定
确定
這時複用的子產品附着在滑鼠上，點選放置。
即完成子產品的複用。剛才儲存的複用子產品已經添加到目前的項目中。
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The PADS Layout user interface is designed for ease of use and efficiency. PADS Layout is designed to meet the needs of the power user, while keeping the beginner in mind. PADS Layout’s interface and interaction are similar to other Windows ™ applications. You can interact with PADS Layout using the keyboard, menus, toolbars, and shortcut menus.
To change the unit of measure to inches, mils (default setting), or metric units, click Options on the Tools menu. The Design Units settings are on the Global >General page of the Options dialog box. Leave the current setting of Mils.
During the many phases of the PCB process, you may want to select only specific objects. For example, during component placement you may want to limit selections to components and during interactive routing you may want to limit selections to connections or routes.
To accommodate this working preference, there is a Selection Filter. With theSelection Filter, you can specify which design objects are selectable. Items turnedoff in the list can't be selected.
You display attributes in the design as text labels. You can also add additionallabels to accommodate different size and location requirements for referencedesignators. The visibility and position of each label is managed within the Layout Editor.
You can predefine locations for attribute labels by adding placeholder labels in the PCB decal. The placeholders act as the defaults for new labels added or made visible in the Layout Editor.
Position the Name and Type labels in the decal where the text will not be obscured when visible.
1. Select button .
2. With nothing selected, right-click and click Select Text/Drafting.
3. Select each label and to move it press Ctrl+E.
4. Place them in the approximate location shown in the "Creating a PCB Decal"
section at the beginning of the tutorial.
5. Click to complete the moves.