Flow chart for choosing indexing operations

[shoyer]

We have a lot of indexing operations, even though sel_points and isel_points are about to be deprecated (#1473).

A flow chart / decision tree to help users pick the right indexing operation might be helpful (e.g., like this skimage FlowChart). It would ask various questions (e.g., do you have labels or integer positions? do you want to select or impose coordinates?) and then suggest appropriate the indexer methods.

cc @fujiisoup

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[stale]

In order to maintain a list of currently relevant issues, we mark issues as stale after a period of inactivity

If this issue remains relevant, please comment here or remove the stale label; otherwise it will be marked as closed automatically