to use a project package file , just export project 1-Export project
Right-click on your project and click export
set name and select the path that you need to save
A project package contains all the elements from the project.
Project package files have the .axpp file name extension.
2-import project
To use the contents of a project package file, you must import the .axpp file into an installation.
go to dynamics 365 tab in visual studio and click import
note
The elements from the project package file will be imported into the same model that they were exported from. If that model doesn’t exist in the installation, it will be created during the import process.
you can check this link for more details.
specify the location for project file that you need to import and click overwrite if you need to overwrite the existing element
also, you can open this project in the current solution or create new if you need
you can select all elements or specific element form details, just check or uncheck
click OK
click ok to reload
also, the built must be stopped before the project can be closed
you can stop built from the built tab and click cancel
you can view history to compare the previous version and checked in version to see the difference.
just right click on your element and click view history
Thanks.