Does a Wizard automatically know how to craft scrolls from known spells?
In the DMG (p. 128) it is stated that to craft a magical item during downtime, a character
must have a formula that describes the construction of the item.
However, it does not give any more details on what form this "formula" must take, or how it should be acquired.
Meanwhile, in the Basic Rules, it is stated that a wizard can copy spells from one spellbook into another:
You can copy a spell from your own spellbook into another book—for example, if you want to make a backup copy of your spellbook. This is just like copying a new spell into your spellbook, but faster and easier, since you understand your own notation and already know how to cast the spell.
From this, we can deduce that a wizard has at least a basic idea of how to represent spells in graphical form, however it is not clear to me whether this knowledge is sufficient to craft a spell scroll, which is an innately magical item quite different (in my understanding) from a simple representation of a spell in a spellbook.
Do the rules on copying spellbooks automatically allow a wizard to craft a spell scroll from a spell in their spellbook (assuming they meet all other requirements — e.g. being at least level 3, having the requisite time and GP), or does the wizard need to acquire a separate "formula" describing how to do so?