You can use the staff site to enter multiple gifts quickly by setting default values that apply to all gifts entered in a single session.
iMIS 2017 lets you set defaults for Date received, Batch, Distribution, Salutation, Appeal, Merge, Campaign, Sender, Fund, Pay by (payment type), Gift type (gift or single pledge), Gift amount, Description, and Notes. With the exception of the Date received, Batch, and Gift type, all of these defaults are optional. You then tell iMIS how many rows to pre-populate with the defaults, and iMIS builds a table that allows you to fill in the blanks, and rapidly process multiple donations at once.
Looking forward to iMIS 20.3, iMIS no longer builds a grid, but it lets you set up default values to pre-populate the Amount, Gift item (distribution), and Source code with defaults. It then allows you to fill in all the other details including pledge installments and payments, soft credits, and more.