How can I specify a nonstandard genetic code for translations?
Open the Translation Options Dialog
Use the side toolbar Show Translations drop down to choose Translation Options....
Alternatively, use menu View → Translation Options... .
Choose the Translation Genetic Code
Use the Genetic code for ORFs and new features dropdown menu to choose the desired genetic code.
To apply the selected genetic code to existing features, click the check box. Close the dialog by clicking OK.
Review the Genetic Code Table
To review the selected genetic code translation table, click Tools → Genetic Code Tables. Mouse over the window matrix to highlight redundant translations.