One of the unique and powerful features of HIARCS Chess Explorer is the Merge game feature.
You can access Merge game from the Edit->Paste->Merge with current game menu item
This feature allows you to paste a game from the clipboard into the current game, merging the two games together.
This enables you to analyse a game in multiple database contexts or even in other chess software and merge your work at the end into one single game in HIARCS Chess Explorer. This allows you to collate all your analysis from multiple sources into one game within the Game Notation. This is also useful if someone else does some analysis for you and sends you the game you can easily merge the game with your own work.