Canvas X Draw has a quick way to change all instances of a selected ink in a single document: the Replace Ink Attributes command. This function can be applied to pen and fill inks for both vector and text objects.
From the Replace With menu, select a replacement ink.
All the objects in the document using the selected ink are updated with the new ink.
Select the Show Color Icons checkbox to display symbols on the ink tiles identifying which are RGB and PANTONE respectively. CMYK inks are identified by a lack of symbol.