Can you alter/ change the results of a Survey? Further can you alter the appearance to not show a pie chart?
You can certainly change your pie charts to bar graphs (for compatible question types). You can view the different options available for pie charts in Standard Reports, here:
I’m not entirely sure what you mean by changing the results of your survey, so perhaps you can clarify?
You can delete responses. Check out the Help Documentation here:
There is not a directly means for aggregating data from multiple surveys. I often do this outside of SurveyGizmo in Excel. If you have multiple identical surveys, you could consider making a copy of one of them as a ‘Master Copy’ and you could use the Data Import tool to import data from the other survey into it:
Can you delete the individual responses so that they do not show? Further can you aggregate survey results taken from multiple surveys?