I am brand new to Gimp and I couldn't find the answer to this simple question after a quick google search. I have a text object and have applied a drop shadow filter on it. I am wondering if there is anyway to modify this filter instead of deleting it and creating a new filter with different values. Sorry if this seems like a dumb question I am very new. Thank you for any help!
You can't without deleting the layer made by the drop shadow filter, although you can move the layer, and you could apply additional filters to the shadow layer.
However, there is a Layer Effects plugin written in Python which allows for some adjustability, with a live preview option that can be activated before you apply a drop shadow. But after you've applied it, you'd still need to delete the layers created to make a different drop shadow.
The Layer Effects plugin is contained in the GIMP Extensions pack here (Windows installer)
Or if you just want the Python script you can download it here
Here's a screenshot of the plugin in action