STEPPED TANGENT

Currently the tangents are set to "stepped" mode and cannot be edited conventionally. To change this we will convert them to "linear" mode, another preset tangent type. First isolate and frame the Translate Y curve. When changing tangent types, the keys of all displayed animation curves will receive tangent changes. However, if there are keys selected only those will have their tangents changed. For now we want to affect the entire curve so make sure no key is selected.