# Creating an Assembly on the Library File Management Page On the library file management page, an assembly can be added by choosing **Add assembly…** from the *Assembly* drop-down list (Figure 1). If the list is long, you may need to scroll to the bottom.

Figure 1. Adding an assembly on the library file management page

In the *Add assembly* dialog, choose the **Species** from the drop-down list (Figure 2), followed by the **Assembly** version (Figure 3) and click **Add**. The dialog will automatically load commonly used assembly versions for the selected species (Figure 3). If the assembly version you want does not appear in the list, choose **Other** and type the custom assembly version name (Figure 4). Characters such as $ \* | \ : " < > ? / % cannot be used in custom names. Note that If an assembly version for a given species already exists on your system, it will not appear in the drop down list.

Figure 2. Add assembly dialog. The species can be chosen from the drop-down list.

Figure 3. For the chosen species, commonly used assembly versions can be chosen from the drop-down list.

Figure 4. A new assembly version can be added by choosing Other and typing the custom assembly version name manually.

If the species you want to add does not appear in the list, scroll to the bottom of the species list, choose **Other** and manually type the species name and assembly version (Figure 5).

Figure 5. A new species can be added by typing the name and assembly name manually.

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