Let the user decide the size and alignment of the produced diagram in the code (no css/json)

[whitenoisedev]

Is your feature request related to a problem? Please describe.
There is no way to specify the size and position (page alignment: left, centered) of a produced diagram within the diagram description/code itself.
The diagram size can either be absolute (in px), or relative to the page width(in %), or unbounded.

Describe the solution you'd like

align left
size 800px 600px

or

align center
size 80%

Additional context
Right now, only some graph types support some limited configuration regarding their size via directives, some others use json/cli, and some others are sizable only via obscure CSS.

Mermaid cannot be embedded in other tools to create user-definable graphs without this. The users end up having a graph that is too big, too small, not aligned as they would like to be etc.

[stackengineer]

I would expect this issue to have garnered more attention by now. My use case is comparing two graphs. I am trying to show where a longer graph diverges from a shorter graph by (left) aligning their starting nodes. Both graphs being centered by default within the markdown causes the similarities/differences to be lost visually.

[sam1am]

I am hitting this limitation with mermaid as well.
See here: https://forum.obsidian.md/t/mermaid-pie-chart-is-cut-off-clipped/47699

[whitenoisedev]

The pie chart specifically is a different problem.

See #4082