谢谢老猫律师。读了一下，大概明白了一点

意思就是旧律师的withdraw不是必须的，我作为客户有权让新律师来替补， 是不是这样的意思？

就是说我可以跟我的新律师说，新律师可以成为 substitution of counsel based on following sentences:

Procedures for Withdrawal or Substitution of Counsel
Based on the significant number of motions to withdraw and file reassignments by Plaintiffs in recent months, the following outlines the procedures to be followed.
The attorney of record on the case status remains the same until entry of a court order of withdrawal or substitution of counsel.

但是下面这句话又是什么意思？又似乎motion to withdraw是必须的：

似乎需要：

1. withdraw

2. substitution

3. consent by client

All motions to withdraw must be properly filed and noticed; the court will not entertain ore tenus motions to withdraw.

Compliance with the provisions of rule 2.505(c)(2) Fla. R. Jud. Admin. (2012) concerning withdrawal and substitution of counsel is mandatory. This requires the signature/consent of the client. The Order granting substitution of counsel should reference the docket code "OSOC", in the upper left corner and must include the Fla. Bar No. of the new counsel. Attorneys who substitute in are responsible for the action and should be prepared to proceed and become fully familiar with the file and docket.

If an order of withdrawal or substitution of counsel, is entered after issuance of notice of hearing for summary judgment or notice of trial, counsel must promptly e-file a notice of appearance through the Court's ePortal and serve copies on all parties.