The Launch Document feature for GlobalSearch comes with Launch Tables configured for Word, Excel, and PowerPoint documents. These launch tables already have command-line arguments specified, but any valid switch can be used. For example, if you wanted to launch Excel documents without the startup screen, you can add the argument "/embed".
Microsoft provides documentation for the Command-line switches that can be used with Microsoft Office products. They are available at the following link: https://support.office.com/en-us/article/command-line-switches-for-microsoft-office-products-079164cd-4ef5-4178-b235-441737deb3a6