Improve figure quality

[liuxinyu95]

Improve figure quality

[liuxinyu95]

The svg package need --shell-escape option, and the Inkscape being installed to provide external support (file conversion etc.). To minimize the potential dependencies. I'll limit to use drawio as the tool to draw figure, export to PDF (also vector based), and use pdfcrop provided in all LaTeX distributions, to crop the content. As the PDF is directly supported in graphicx. There's no need to use other file converter.

[liuxinyu95]

The drawio app provides an crop option when export current page to pdf. aedee63 is done with this method.

[liuxinyu95]

Applied combined solution: (1) for drawio, export single tab figure with crop option; (2) for slides, export to multipage pdfs, then apply pdfcrop, and reference with page=no. in graphicx.