📖added information on overflow behavior  (#24445)
📖added information on overflow behavior  (#24445)

* updated

* clarified

nexxtv/amphtml,voyagegroup/amphtml,adup-tech/amphtml,media-net/amphtml,erwinmombay/amphtml,yandex-pcode/amphtml,Gregable/amphtml,rsimha-amp/amphtml,taboola/amphtml,rsimha-amp/amphtml,cory-work/amphtml,jmadler/amphtml,danielrozenberg/amphtml,src-code/amphtml,taboola/amphtml,media-net/amphtml,zhangsu/amphtml,ampproject/amphtml,taboola/amphtml,voyagegroup/amphtml,danielrozenberg/amphtml,honeybadgerdontcare/amphtml,ampproject/amphtml,sharethrough/amphtml,yandex-pcode/amphtml,lannka/amphtml,nexxtv/amphtml,zhangsu/amphtml,nexxtv/amphtml,dotandads/amphtml,tlong2/amphtml,adup-tech/amphtml,yandex-pcode/amphtml,honeybadgerdontcare/amphtml,zhangsu/amphtml,rsimha-amp/amphtml,smartadserver/amphtml,dotandads/amphtml,jpettitt/amphtml,nexxtv/amphtml,sharethrough/amphtml,jpettitt/amphtml,zhouyx/amphtml,voyagegroup/amphtml,prateekbh/amphtml,mhc-gh/amphtml,danielrozenberg/amphtml,zhangsu/amphtml,lannka/amphtml,taboola/amphtml,src-code/amphtml,tlong2/amphtml,cory-work/amphtml,honeybadgerdontcare/amphtml,cory-work/amphtml,rsimha-amp/amphtml,media-net/amphtml,alanorozco/amphtml,Gregable/amphtml,danielrozenberg/amphtml,yandex-pcode/amphtml,danielrozenberg/amphtml,smartadserver/amphtml,yandex-pcode/amphtml,danielrozenberg/amphtml,alanorozco/amphtml,tlong2/amphtml,Gregable/amphtml,rsimha-amp/amphtml,ampproject/amphtml,media-net/amphtml,media-net/amphtml,prateekbh/amphtml,jridgewell/amphtml,zhouyx/amphtml,jmadler/amphtml,ampproject/amphtml,zhouyx/amphtml,rsimha-amp/amphtml,lannka/amphtml,sharethrough/amphtml,Gregable/amphtml,zhangsu/amphtml,alanorozco/amphtml,src-code/amphtml,lannka/amphtml,erwinmombay/amphtml,cory-work/amphtml,cory-work/amphtml,src-code/amphtml,lannka/amphtml,mhc-gh/amphtml,jpettitt/amphtml,jpettitt/amphtml,tlong2/amphtml,rsimha-amp/amphtml,taboola/amphtml,src-code/amphtml,honeybadgerdontcare/amphtml,zhangsu/amphtml,tlong2/amphtml,zhouyx/amphtml,nexxtv/amphtml,jridgewell/amphtml,voyagegroup/amphtml,prateekbh/amphtml,lannka/amphtml,ampproject/amphtml,prateekbh/amphtml,jmadler/amphtml,erwinmombay/amphtml,jridgewell/amphtml,smartadserver/amphtml,adup-tech/amphtml,media-net/amphtml,taboola/amphtml,ampproject/amphtml,taboola/amphtml,jpettitt/amphtml,media-net/amphtml,yandex-pcode/amphtml,smartadserver/amphtml,alanorozco/amphtml,alanorozco/amphtml,jridgewell/amphtml,alanorozco/amphtml,media-net/amphtml,adup-tech/amphtml,smartadserver/amphtml,sharethrough/amphtml,honeybadgerdontcare/amphtml,jridgewell/amphtml,mhc-gh/amphtml,jpettitt/amphtml,jmadler/amphtml,mhc-gh/amphtml,erwinmombay/amphtml,sharethrough/amphtml,zhouyx/amphtml,jpettitt/amphtml,mhc-gh/amphtml,adup-tech/amphtml,ampproject/amphtml,erwinmombay/amphtml,alanorozco/amphtml,honeybadgerdontcare/amphtml,nexxtv/amphtml,cory-work/amphtml,voyagegroup/amphtml,Gregable/amphtml,cory-work/amphtml,voyagegroup/amphtml,danielrozenberg/amphtml,jmadler/amphtml,mhc-gh/amphtml,prateekbh/amphtml,jmadler/amphtml,ampproject/amphtml,dotandads/amphtml,zhouyx/amphtml,mhc-gh/amphtml,prateekbh/amphtml,dotandads/amphtml,Gregable/amphtml,dotandads/amphtml,nexxtv/amphtml,honeybadgerdontcare/amphtml,yandex-pcode/amphtml,sharethrough/amphtml,jridgewell/amphtml,Gregable/amphtml,zhouyx/amphtml,dotandads/amphtml,jridgewell/amphtml,adup-tech/amphtml,voyagegroup/amphtml,src-code/amphtml,mhc-gh/amphtml,tlong2/amphtml,prateekbh/amphtml,alanorozco/amphtml,erwinmombay/amphtml,danielrozenberg/amphtml,smartadserver/amphtml,Gregable/amphtml,lannka/amphtml,jpettitt/amphtml