MINDoSOFT opened a new issue #10618: SaveAsImage add chart watermark URL: https://github.com/apache/incubator-echarts/issues/10618 ### What problem does this feature solve? I need to add some customization on the chart (e.g. watermark), that needs to happen only when the chart's saveAsImage toolbox button is clicked. ### What does the proposed API look like? I believe this can be fixed with 2 different ways. One way is to add a backgroundImage option is saveAsImage chart option. https://ecomfe.github.io/echarts-doc/public/en/option.html#toolbox.feature.saveAsImage this backgroundImage will be added as background to the chart only in the exported image produced when the chart's saveAsImage toolbox button is clicked. The other way I can think of is to add two events on the chart called saveAsImageBefore/After (like restore event exists) https://ecomfe.github.io/echarts-doc/public/en/api.html#events.restore saveAsImageBefore will have some code to draw the watermark, and saveAsImageAfter will hide the watermark. <!-- This issue is generated by echarts-issue-helper. DO NOT REMOVE --> <!-- This issue is in English. DO NOT REMOVE -->
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